Chii chiri mhedzisiro yechimiro chakasiyana chepakutanga chesimbi pa induction hardening?

Nhanho iyo ferrite uye cementite inoshanduka kuita austenite zvinoenderana netembiricha, kuumbwa kwesimbi, uye chimiro chepakutanga.

Iyo yekuumbwa mwero weiyo nyowani austenite chikamu nzvimbo uye nekukura mwero kwenzvimbo idzi zvinotariswa neicho chepakutanga chimiro. Izvo zvakanyanya kupararira chimiro chepakutanga, diki diki pakati peferrite uye cementite zvidimbu, saka iyo austenite nucleus inopisa. Iyo inokurumidza iyo yekuzvarwa uye yekukura chiyero. Sezvo iyo ferrite-cementite musanganiswa ichiumba austenite pamuganhu wedanho ndege yezvikamu izvi, iyo inovhenekesa chimiro chepakutanga, yakakura ndege yekuparadzanisa (reaction inoshanda pamusoro) yechikamu. Izvo zvakapararira zvinyama zvekutanga ndezvekuti, ipfupi nguva inotarisirwa kuti kuumbika kuve yunifomu kana mhinduro yakasimba yapiswa. Naizvozvo, iyo yekutanga mamiriro mamiriro akakosha kwazvo kune induction kuomesa.

Mune yakasarudzika kana kubvutwa mamiriro, chimiro chepakutanga chesimbi hypoutectoid iparera uye yemahara ferrite, uye kumhanya kwayo kwekusimudzira kunononoka kupfuura iko kwekudzimwa uye kutsamwa kwesorbite (yakapararira ferrite cementite musanganiswa) Kuti inyatso kudzimwa, yakajairwa kana yakakwenenzverwa simbi inofanira kudzimwa. uye inodzora pane yakanyanya kudzima tembiricha pane yakadzimwa uye yakatsamwa simbi.

Rimwe basa rekutora iyo sorbite chimiro ndechekudzivirira iyo simbi kuti iunze rakakura rakasarudzika kushushikana panguva yeiyo induction quenching. Sevanhu vese zvavanoziva, kukura kwekusara kwekushushikana musimbi yakadzimwa, pakati pezvimwe zvinhu, zvakare kunoenderana nekupedza tembiricha. Iyo yakakwira iyo tembiricha inodzima, iyo inowedzera iyo yakasara yekushushikana mune yakadzimwa simbi. Iyo tembiricha yekudzimisa inodiwa kune iyo yakadzimwa uye yakapfava chimiro ndiyo yakadzikira, saka kusara kwekushushikana mushure mekudzima zvakare kuri kudiki, kuchideredza njodzi yekudzima kutsemuka uye kupwanya. Kudzima uye kudzikamisa kurapwa kunogona kuvandudza kusimba kwemoyo, saka zvinodikanwa kune zvakakosha zvikamu zvinoda yakakwira michina zvivakwa.